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zmey [24]
3 years ago
14

HELPPOOOOOOOOOO!!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
Rina8888 [55]3 years ago
8 0

Answer:

the correct answer is3 1/2

Anettt [7]3 years ago
5 0
3 1/2 should be your answer I hope this helps :)
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Step-by-step explanation:

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The mayor is interested in finding a 95% confidence interval for the mean number of pounds of trash per person per week that is
Hatshy [7]

Answer:

A. <u>Normal</u>

B. <u>30.1</u>, <u>32.9</u>

C. <u>95</u>, <u>5</u>

Step-by-step explanation:

A. The sampling distribution follows a <u>normal</u> distribution

Given that the sample size is large, we have that the sample distribution follows a normal distribution according to the central limit theorem

B. The 95% confidence interval is given as follows;

CI=\bar{x}\pm z \times \dfrac{s}{\sqrt{n}}

The number of residents in the study, n = 120 residents

The sample mean, \overline x = 31.5 pounds

The standard deviation, s = 7.8 pounds

The z-value for 95% confidence level, z = 1.96

Therefore, we get;

C.I. = 31.5 ± 1.96 × 7.8/√(120)

The 95% C.I. ≈ 30.1 ≤ \overline x ≤ 32.9

Therefore, we have that with 95% confidence, the population mean number of pounds per person per week is between <u>30.1</u> and <u>32.9</u>

C. Therefore, according to the central limit theorem, about <u>95</u> percent of the groups of 120 will contain the true population mean number of pounds of trash generated per person per week and about <u>5</u> percent will not contain the true population mean number of pounds of trash generated per person per week.

8 0
3 years ago
12 is 80% of what number
jonny [76]
 the answer is 15 because 12 is 80% of 15 
















6 0
3 years ago
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